<template>
<div class="site-wrapper site-page--login">
    <div class="site-content__wrapper">
        <div class="site-content">
            <div class="brand-info">
                <h2 class="brand-info__text">文渊图书馆</h2>
                <p class="brand-info__intro">文渊图书馆是一所高校的校园图书馆。馆内拥有丰富的馆藏资源，涵盖了学校的所有学科，为学校的教学与科研提供了强有力的文献信息保障。</p>
            </div>
            <div class="login-main">
                <h3 class="login-title">管理员登录</h3>
                <el-form :model="dataForm" :rules="dataRule" ref="dataForm" @keyup.enter.native="dataFormSubmit()" status-icon>
                    <el-form-item prop="userName">
                        <el-input v-model="dataForm.userName" placeholder="帐号"></el-input>
                    </el-form-item>
                    <el-form-item prop="password">
                        <el-input v-model="dataForm.password" type="password" placeholder="密码"></el-input>
                    </el-form-item>
                    <el-form-item prop="captcha">
                        <el-row :gutter="20">
                            <el-col :span="14">
                                <el-input v-model="dataForm.captcha" placeholder="验证码">
                                </el-input>
                            </el-col>
                            <el-col :span="10" class="login-captcha">
                                <img :src="captchaPath" @click="getCaptcha()" alt="">
                            </el-col>
                        </el-row>
                    </el-form-item>
                    <el-form-item>
                        <el-button class="login-btn-submit" type="primary" @click="dataFormSubmit()">登录</el-button>
                    </el-form-item>
                </el-form>
            </div>
        </div>
    </div>
</div>
</template>

<script>
import {
    getUUID
} from '@/utils'
export default {
    data() {
        return {
            dataForm: {
                userName: '',
                password: '',
                uuid: '',
                captcha: ''
            },
            dataRule: {
                userName: [{
                    required: true,
                    message: '帐号不能为空',
                    trigger: 'blur'
                }],
                password: [{
                    required: true,
                    message: '密码不能为空',
                    trigger: 'blur'
                }],
                captcha: [{
                    required: true,
                    message: '验证码不能为空',
                    trigger: 'blur'
                }]
            },
            captchaPath: ''
        }
    },
    created() {
        this.getCaptcha()
    },
    methods: {
        // 提交表单
        dataFormSubmit() {
            this.$refs['dataForm'].validate((valid) => {
                if (valid) {
                    this.$http({
                        url: this.$http.adornUrl('/sys/login'),
                        method: 'post',
                        data: this.$http.adornData({
                            'username': this.dataForm.userName,
                            'password': this.dataForm.password,
                            'uuid': this.dataForm.uuid,
                            'captcha': this.dataForm.captcha
                        })
                    }).then(({
                        data
                    }) => {
                        if (data && data.code === 0) {
                            this.$cookie.set('token', data.token)
                            this.$router.replace({
                                name: 'home'
                            })
                        } else {
                            this.getCaptcha()
                            this.$message.error(data.msg)
                        }
                    })
                }
            })
        },
        // 获取验证码
        getCaptcha() {
            this.dataForm.uuid = getUUID()
            this.captchaPath = this.$http.adornUrl(`/captcha.jpg?uuid=${this.dataForm.uuid}`)
        }
    }
}
</script>

<style lang="scss">
.site-wrapper.site-page--login {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-color: rgba(38, 50, 56, .6);
    overflow: hidden;

    &:before {
        position: fixed;
        top: 0;
        left: 0;
        z-index: -1;
        width: 100%;
        height: 100%;
        content: "";
        background-image: url(~@/assets/img/login_bg.jpg);
        background-size: cover;
    }

    .site-content__wrapper {
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        padding: 0;
        margin: 0;
        overflow-x: hidden;
        overflow-y: auto;
        background-color: transparent;
    }

    .site-content {
        min-height: 100%;
        padding: 30px 500px 30px 30px;
    }

    .brand-info {
        margin: 220px 100px 0 90px;
        color: #fff;
    }

    .brand-info__text {
        margin: 0 0 22px 0;
        font-size: 48px;
        font-weight: 400;
        text-transform: uppercase;
    }

    .brand-info__intro {
        margin: 10px 0;
        font-size: 16px;
        line-height: 1.58;
        opacity: .6;
    }

    .login-main {
        position: absolute;
        top: 0;
        right: 0;
        padding: 150px 60px 180px;
        width: 470px;
        min-height: 100%;
        background-color: #fff;
    }

    .login-title {
        font-size: 16px;
    }

    .login-captcha {
        overflow: hidden;

        >img {
            width: 100%;
            cursor: pointer;
        }
    }

    .login-btn-submit {
        width: 100%;
        margin-top: 38px;
    }
}
</style>
